SECTION 12
TIRE INFLATI0N SYSTEM
valve seats can be removed: Their removal is
(1). The cylinder block and crankcase.
not necessary unless they are badly worn or
nicked.
(2). End cover and crankcase.
12-25. DISASSEMBLY OF CONNECTING ROD
(3). Position of crankshaft in relation to
ASSEMBLY (see figure 12-7).
crankcase.
a. Straighten prongs of connecting rod bolt
(4). Cylinder head and block.
lockwashers and remove bolts, lockwashers
and bearing caps.
12-23. DISASSEMBLY.
b. Push piston with connecting rods attached
12-24. DISASSEMBLY OF CYLINDER HEAD
out the top of the cylinder block.
(see figure 12-6.
c. Replace bearing caps.
a. Remove capscrews and lift off cylinder
head. If necessary, tap it with a soft hammer
d. To remove pistons from connecting rods,
to break gasket joint.
remove wrist pin lock wires and press wristpins
from pistons and connecting rods.
b. Remove inlet valve springs from the head
and inlet valves from their guides in the block.
e. Remove capscrews securing end cover at
drive end of crankshaft.
c. Scrape off cylinder head gasket from
cylinder head and block.
12-26. DISASSEMBLY OF CRANKCASE (see)
d. Remove discharge valve cap nuts and lift
out discharge valve springs and valves. The
a. Remove end cover and oil seal. Remove
end cover gasket. Replace oil seal after
cleaning end cover.
b. Remove capscrews that hold the opposite
end cover to the crankcase. Remove end cover
and gasket.
NOTE: If the crankcase has a shoulder for
p o s i t i o n i n g of the crankshaft, the
crankshaft can be removed through one
end only.
c. Press the crankshaft and ball bearings
from the crankcase and press the bearings
from the crankshaft.
12-27. DISASSEMBLY OF CYLINDER BLOCK
(see figure 12-7).
a. Remove the capscrews securing cylinder
block to crankcase. Separate crankcase and
cylinder block and scrape off gasket.
b. Remove unloader spring, spring saddle
and spring seat from cylinder block.
c. Remove unloader guides and plungers.
With the use of shop air, blow unloader
pistons out of cylinder block unloader piston
bores.
FIGURE 12-6.
d. Remove inlet valve guides. Remove inlet
12-4.